Rotary motor.



No. 674,837. Patented May 2l, I90l. H. 0. GADBERRY.

ROTARY MOTOR.

(Application filed June 4, 1900. Renewed Apr. 30, 1901.) (No Model.) 2 Sheets-Sheet l.

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Patented May 2|, I90I. H. 0. GADBERRY.

ROTARY MOTOR.

`App1ication filed June 4, 1900. Renewed Apr. 30, 1901.) (No Model.)

2 Sheets-Sheet 2.

s El u En ,UW/mfom M2M/( j j @www iiED STATES PATENT OFFICE.

HARVEY O. GADBERRY, OF CARTHAGE, MISSOURI.

ROTARY Nl OTO R.

SPECIFICATION forming part 0f Letters Patent NO. 674,837, dbted May 21, 1901 Application fled June 4. 1900. Renewed April 30, 1901. Serial No. 58,185. (No model.)

To all wtmn it may concern:

Beit known that I, HARVEY O. GADBEEEY, a citizen of the United States, residing at Carthage, in the county of Jasper, State of Missouri, have invented certain new and useful Improvements in Rotary Motors; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the gures of reference marked thereon, which form a part of this specification.

This invention relates to rotary motors and involves an improvement in the construction shown in Letters Patent issued to me on the 20th day of February, 1900, No. 643,791.

The invention consists in certain combinations and4 associations of elements hereinafter more fully set forth, and pointed out particularly in the claims.

The objects of the invention are to increase the efficiency of the motor by reducing Afriction, enabling the development of greater horse-power for a given steam-pressure, to effect economy in the consumption of steam and in the cost of the construction of the motor, and by decreasing the wear upon the parts increase the life of the apparatus.

The above objects are attained by the mechanism illustrated in the accompanying drawings, in which- Figure 1 is a vertical section axially of the cylinder and piston and through a portion of the frame and casing, other parts appearing in elevation. Fig. 2 is a transverse section of the cylinder and piston as taken at right angles to Fig. 1. Fig. 3 is a view of the cylinder with one of the side plates removed, showing the piston in elevation, as well as the packing-roller engaging the lower face of the piston. Fig. 4 is a transverse section through the cylinder, piston, and packing-roller.l Fig. 5 is a section as taken on line 5 5 of Fig. 4. Fig. (i is an enlarged detail View of the slide constituting the piston-wings with its several component parts disseminated.

Referring to the characters of reference, 1 designates a base of any suitable construction upon which the standards 2 are mounted, carrying at their upper ends the roller-bearings 3, which support the main shaft 4. The bore 5 of the cylinder is eccentric to said shaft, and the cylinder is provided with removable side plates or heads 6. The core 7 of the piston is formed upon the shaft 4, concentric therewith and eccentrically disposed with respect to the bore of the cylinder. The ends of the pistoucore lie in suitable apertures formed in the heads of the cylinder concentric with said shaft, said apertures being closed by plates 8,

bolted to the cylinder-heads,and confining packing-rings 9, which form a steam-tight joint between them and the end of the piston.

Formed diametrically of the piston is a way in which is located a slide 10, adapted to reciprocate therein and Whose projecting ends constitute the steam-wings of the piston, the terminals of which operate in contact with the Walls of the cylinder.

The valve-chamber 11 is located within the casing, and into said chamber the steam-induction pipe 12 leads. Oonnectin g said valvechamber with the cylinder are the feed-ports 13,and interposed between said feed-ports and also communicating With the valve-chamber is the exhaust-port 14. Located Within the valve-chamber is a reciprocatory valve 15, adapted to seat over either of the feed-open` ings leading from said chamber and adapted to be reciprocated through the 'medium of a connecting-rod 16, operated from the moving ports of the engine in a manner not shown, as

such features are fully set forth in my patent of February 20, 1.900, above mentioned, and form no part of this application. The valve 15 may be moved so as to cross both of the feed-ports to stop the engine, or it may be moved so as to open either one of the feedports to drive the engine in either direction desired. When one port is serving as the feed-port, the other serves as the exhaust for the escape of the motive force from the cylinder. The valve may be so reciprocated as to cut off the steam at a point calculated to develop the expansive force thereof in its action upon the piston.

The slide 10 of the piston is provided with a circumferential channel, in which are fitted angular packing-strips 16?". The angular extremities of said packing-strips overlap and are held in place by means of the end coilsprings 17 and the side bow-springs 18. The end portion of these packing-strips impinge IOO jecting wing of the slide.

upon and are held in contact with the bore of the cylinder, While the side portion of said strips make a closure against the cylinderheads. The tension of the springs 17 and 18, respectively, serve to hold the sides and ends of the packing-strips in continuous contact with the walls of the cylinder during the rotation of the piston and the longitudinal travel of the slide.

It will be understood that upon the opening of either of the feed-ports the steam will enter the cylinder and impinge against the pro- The force of said steam will rotate the piston and turn the shaft. As the piston rotates the steam-space in the cylinder behind the piston-wing increases as the rotation of the piston carries the slide from a horizontal to a vertical position. At the same time the leverage of the steam upon the piston is increased as the active end of the slide travels away from the pistons axis. The impulse imparted to the engine carries the piston such distance as to bring the opposite end of the slide into position to receive a succeeding jet of steam, while the expanded steam remaining in the cylinder is exhausted through the opposite port, which is straddled by the valve 15. It will be seen that as the piston rotates the slides travel back and forth through the core thereof. This travel of the slide, especially when Athe force of steam is bearing upon it, causes it to create considerable friction. I overcome said friction by mounting within the core of the piston and upon opposite sides of the way therein a series of rollers 19, whose peripheries project into said way and engage said slide. The opposite ends of said rollers are provided with bearing-cones 20, adapted to receive the bearing-balls 21, which are held in place by means of the ball-cups 22, screwed into the opposite ends of the cores of the piston and confining said balls in place. The bore in the core of the piston in which the rollers 19 are located is of greater diameter than said rollers, so that the rollers have contact only with the ball-bearings at their ends and the piston-slide which is located between them. By turning the bearing-cups a perfect adjustment of the bearing at the ends of the rollers maybe effected, so as to take up all wear and lost motion. The use of the an tifriction-rollers Within the core of the piston overcomes to a great extent the friction between the slide and piston-core, and to that extent the eflicien'cy of the engine is increased. The piston has contact with the wall of the cylinder at a point midway between the feed-ports 13, which communicate with said cylinder. At said point of contact is located an antifriction-roller 23, disposed in a way in the wall of the cylinder' and supported at its ends by means of the ball-cups 24, which are threaded in the cylinder-casing and retain the balls 25, which support the conical ends 26 of said roller. This roller serves as a gate to prevent the passage of steam between the pevolves, thereby overcoming the friction between said parts. To prevent the steam from escaping around the roller 23, a packing-strip 27 is employed, located in a recess below said roller and held in contact therewith by means of the bow-spring 28.

The threaded ball-cups 24 are adapted to be turned in the cylinder-casing to take up all lost motion incident to wear, and for the purpose of adjusting the bearings of the roller upon said cups are jam-nuts 29 for the purpose of locking them when properly adjusted.

Located in the core of the cylinder and extending transversely of the way therein which receives the slide 10 are packing-strips 30, which bear upon the opposite faces of said slide and prevent the escape of steam around the antifriction-rollers and through the way of said piston in which said slide is located.

Having thus fully set forth my invention, what I claim as new, and desire to secureby Letters Patent, is-

1. In a rotary engine, the combination of the cylinder, the shaft, the piston thereon, said piston being eccentrically disposed within the cylinder, a slide passing through the piston and having terminal contact with the wall of the cylinder, the periphery of the piston being contiguous to the wall of the cylinder at one point, an antifriction-roller located in the wall of the cylinder at said point and held yieldingly in contact with the periphery of the piston, ports communicating with the cylinder on each side of said antifriction-rolle-r and means for opening and closing said ports.

2Q In a rotary motor, the combination of the cylinder and shaft, the piston mounted on the shaft and eccentrically disposed within the cylinder, the periphery of the piston at a point standing contiguous to the wall of the cylinder and the antifriction-roller located in a recess in the wall of the cylinder at said point of contiguity and engaging the periphery of the piston, a spring-actuated packingstrip engaging the lower side of said roller, ports communicating with the cylinder on either side of the roller and means for opening and closing said ports.

3. In a rotary engine, the combination of the cylinder, having recesses in the heads thereof, the piston eccentrically disposed in the cylinder and having its ends lying in said recesses, said piston having a diametrical way therethrough, a slide located in said way having terminal contact with the wall of the cylinder, antifriction-rollers located in the wall of the piston and engaging the opposite faces of said slide, adjustable bearings consisting of ball-cups movably located in the opposite ends of the piston and carrying a series of balls which serve as bearing-supports for the opposite ends of said rollers whereby lost motion in said bearings may be taken up IOO IIO

and packing-rings in said recesses covering said ball-cups.

4. In a. rotary motor, the combination of the cylinder,the piston eccentrically disposed therein and standing contiguous to the wall of the cylinder :it one point, a recess in the wall of the cylinder at said point of contiguity, an antifriction-roller located in said recess engaging the periphery of the piston,

io bearing-cones on the ends of said rollers and ball-cups screwed into the casing of the cylinder which embrace said bearings and retain a series of balls which Serve as supports for the ends of the rollers.

In testimony whereof I sign this specification in the presence of two Witnesses.

HARVEY O. GADBERRY. Witnesses:

J. I-I. DRYDEN, W. H. MCFALL. 

